CN105170660A - Edge-controlling rolling method for wide magnesium alloy plate - Google Patents
Edge-controlling rolling method for wide magnesium alloy plate Download PDFInfo
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- CN105170660A CN105170660A CN201510553847.7A CN201510553847A CN105170660A CN 105170660 A CN105170660 A CN 105170660A CN 201510553847 A CN201510553847 A CN 201510553847A CN 105170660 A CN105170660 A CN 105170660A
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Abstract
The invention belongs to the field of machining of metal materials, and particularly relates to an edge-controlling rolling method for a wide magnesium alloy plate. In order to solve the problems of serious edge cracking, anisotropic protrusions and the like of an existing rolling process for the magnesium alloy plate, widening rolling and Mizushima automatic plan view pattern control system (MAS) rolling are recombined and optimized, and a method for determining the prefabricated convexity is given definitely specific to magnesium alloy materials. The convexity of the edge of a rolled piece is prefabricated before cross rolling and axial rolling, so that the flow amount of metal at the edge is improved, and the flaws of the head and the tail of a common rolled piece are compensated. Coordinate deformation of the edge and the middle of the rolled piece with low fracture toughness is achieved during rolling and deformation, and therefore edge cracking is relieved or eliminated, the rolling yield of the wide magnesium alloy plate is improved, and the cost is reduced. Meanwhile, orthogonal rolling is achieved in the axial-cross-axial rolling process, the anisotropic defect in the common rolling process is effectively relieved, and the performance of the materials is improved. By means of the edge-controlling rolling method for the wide magnesium alloy plate, the edge cracking and anisotropic defects during rolling of the wide magnesium alloy plate are effectively relieved or controlled, the yield and the performance of the materials are further improved, and the cost is reduced.
Description
Technical field
The invention belongs to metal material processing field, be specifically related to a kind of wide magnesium alloy sheet material control limit milling method.
Background technology
Abundant magnesium resource and significant light weight effect, low energy consumption and easily reclaiming and the characteristic of other excellences, achieved the wide application prospect of magnesium alloy and mathematical status in prospective material field.But its special HCP crystal structure make cryogenic conditions under slip system few, plasticity is poor, fracture toughness is lower, although Prismatic slip and conical surface slippage are started under the high temperature conditions, plasticity increases, but its hot melt is little, rapid heat dissipation, adopt traditional full axial rolling, full transverse rolling, horizontal stroke-axial rolling system, still very easily occur that limit is split during the method rolling magnesium alloys such as vertical-transverse rolling, the problems such as anisotropy is outstanding, greatly reduce lumber recovery and mechanical property, thus significantly add its production cost, particularly the shaping suitability for industrialized production of wide magnesium alloy plate rolling is difficult to realize, become and hindered one of fast-developing technical bottleneck with applying of magnesium alloy plate industry.Also have scholar to propose the method such as asymmetrical rolling, tandem rolling for magnesium alloy specially, in grain refinement etc., have significant effect, but the slab after rolling still exists that serious limit is split and the defect such as anisotropy is outstanding.
Cause the main cause of above-mentioned defect to be: rolled piece metal flow in the operation of rolling follows law of minimum resistance, the resistance that the metal along rolled piece width zone line flows to both sides is comparatively large, therefore main extending longitudinally along rolling direction, and the metal of rolled piece edge due to the resistance flowed to edge less, therefore while extending longitudinally also to edge lateral flow, the extending longitudinally of edge is made to be less than middle part, and rolled piece integrally, edge must be subject to the effect of tension, better for plasticity, the rolled piece of the materials such as the steel that fracture toughness is higher or aluminium alloy, adopt the rolling mode, only there is " tongue " shape defect in rolled piece end, and for magnesium alloy material, then not only there is " tongue " shape defect in end, edge is owing to participating in two to distortion simultaneously, deflection is large, but plasticity is low, metal flow momentum is limited, room after distortion can not get effectively supplementing, and magnesium alloy material fracture toughness is low, thus under action of pulling stress, also there will be limit split.
Therefore, develop and a kind ofly can effectively slow down or control magnesium alloy plate rolled edge and split and the milling method of the defect such as anisotropy, raising lumber recovery and material property, the industrialization production of promotion magnesium alloy plate and application are had great importance.
Summary of the invention
For the current Problems existing of magnesium alloy plate rolling, the object of the invention is to provide and a kind ofly can effectively slows down or control magnesium alloy plate rolled edge and split and the milling method of the defect such as anisotropy, described wide magnesium alloy sheet material control limit milling method, the broadening rolling be applied in steel rolling field and MAS rolling are carried out recombinating and optimizing, and clearly provides the defining method of prefabricated convexity for magnesium alloy materials.By before transverse rolling and axial rolling to the prefabricated edge convexity of rolled piece, improve the amount of flow of edge metal, rolled piece defect end to end after compensation pair rolling, meet formula (1), shadow region as shown in Figure 1, realize synchronously flowing along rolling direction metal in the operation of rolling, make the rolled piece of this low fracture toughness material edge and middle part compatible deformation in rolling deformation process, thus slow down or eliminate limit and split, improve wide magnesium alloy plate rolling lumber recovery, reduce costs; Meanwhile, in vertical-horizontal-vertical operation of rolling, achieve orthogonal rolling, effectively can weaken anisotropy defect during pair rolling, improve material property, thus for promoting that magnesium alloy plate industrialization production and application provide technical support.
(1)
In formula,
for drafts during prefabricated convexity;
after prefabricated convexity, blank rolls to length;
for convexity length in the horizontal direction;
for the area of region DEF, for the particular alloy trade mark, obtained by rolled piece end defect empirical value when adopting pair rolling under this condition, as shown in Figure 1.
The present invention includes: prefabricated transverse rolling edge convexity, the broadening rolling of orthogonal control limit and the three large steps such as prefabricated axial rolling edge convexity, the longitudinal finish rolling in orthogonal control limit, concrete invention process is as follows.
(1) prefabricated transverse rolling edge convexity, as shown in Fig. 2 (a): first rolled piece is carried out longitudinal rolling, and in this operation of rolling prefabricated end convexity, i.e. prefabricated transverse rolling edge convexity, according to milling train roll surface effective length and rolled piece width before rolling, length, thickness determination drafts and roll rearward end convexity, it determines that principle is: before and after rolling, rolled piece width is similar to constant, and the length that this passage rolls rear rolled piece should be less than or equal to roll surface effective length, lower a time rolled piece can be carried out and turn to the transverse rolling after 90 °, maximize to make rolling efficiency, get the length that this passage rolls rear rolled piece and equal roll surface effective length, prefabricated transverse rolling edge convexity and horizontal length thereof can be obtained by formula (2), then rolled piece half-twist is prepared to carry out the broadening rolling of orthogonal control limit.
(2) the broadening rolling of orthogonal control limit and prefabricated axial rolling edge convexity, as shown in Fig. 2 (b): after the operation of rolling as described in completing steps (1), carry out transverse spreading rolling, the rolled piece width after broadening is made to equal finished width, this link at least needs two passes, and in the end a time prefabricated axial rolling edge convexity, edge convexity and horizontal length thereof are still determined by (2) formula.
(3) the longitudinal finish rolling in orthogonal control limit, as shown in Fig. 2 (c): after the prefabricated axial rolling edge convexity as described in completing steps (2), first by rolled piece half-twist, then carry out the little pressure rolling of longitudinal multi-pass, until target thickness, complete rolling.
(2)
In formula,
for prefabricated edge convexity;
for convexity length in the horizontal direction;
when prefabricated transverse rolling edge convexity, for rolling rear length of rolled piece and working roll can roll Breadth Maximum, when prefabricated axial rolling edge convexity, be finished width;
for drafts during prefabricated edge convexity;
for correction factor, to split defect relevant along the plate width direction degree of depth with limit when alloy designations, coefficient of draught and pair rolling, value 150 ~ 350;
,
,
be followed successively by thickness, length and the width before the prefabricated convexity of rolled piece;
for the thickness in convexity region non-after the prefabricated convexity of rolled piece.
Advantage of the present invention and good effect as follows.
(1). adopt control limit of the present invention milling method, under suitable rolling condition, the defect end to end that can effectively control in the magnesium alloy plate operation of rolling then slows down or eliminates limit splits generation, improves lumber recovery, thus significantly reduces production cost; Rotation rolled piece described in this method carries out orthogonal rolling simultaneously, effectively can weaken anisotropy defect during pair rolling, improves plate property and productivity effect.
(2). adopt control limit of the present invention milling method, after the rolling of first two steps, the crystal grain of magnesium alloy rolled piece obtains refinement, and mechanical property is improved, and therefore on orthogonal control limit, longitudinal finish rolling stage can realize depressing rolling greatly, and rolling efficiency is improved.
(3) though. process of the present invention is carried out for magnesium alloy material, and the method is applied widely, can be applicable to the control that the difficult deformable metal gold copper-base alloy such as titanium alloy, molybdenum alloy rolled edge splits.
Accompanying drawing explanation
The prefabricated analysis schematic diagram of Fig. 1 convexity.
Fig. 2 wide magnesium alloy sheet material control limit rolling flow chart, in figure, solid line is the template after control limit of the present invention milling method rolls, and dotted line is the template after pair rolling rolls; Fig. 2 (a) prefabricated transverse rolling edge convexity; Fig. 2 (b) orthogonal control limit broadening rolling and prefabricated axial rolling edge convexity; The longitudinal finish rolling in the orthogonal control limit of Fig. 2 (c).
Detailed description of the invention
Blank is AZ31B magnesium alloy ingot, and specification is: thick × wide × length=360mm × 1000mm × 1500mm, and milling equipment is four-high mill, and working roll: 700mm × 2400mm rolls rear finished product: thick × wide=50mm × 2000mm.
According to the method for the invention: first determine prefabricated transverse rolling edge convexity, according to set operation roll of mill specification,
=2000mm, for magnesium alloy AZ31 material and blank specification and roll rear size, gets
=335, by (2) Shi Ke get:
55mm,
=364mm,
=110mm, can complete prefabricated transverse rolling edge convexity according to flow process Fig. 2 (a) Suo Shi; Then carry out the broadening rolling of control limit to the rolled pieces of 90 ° of rotations, carry out two passages altogether, after the first passes, former blank width broadening is to 1500mm,
=70mm, the second passage carries out the rolling of prefabricated axial rolling edge convexity, rolls rear former blank width broadening to finished width, namely
=2000mm, gets
=335, by (2) Shi Ke get: now
27.5mm,
=364mm,
=55mm; Finally 90 ° are turned to the rolled piece completing prefabricated axial rolling edge convexity, carry out the little pressure axial rolling of multi-pass, direct at target thickness.
Claims (1)
1. a wide magnesium alloy sheet material control limit milling method, its feature comprises the steps:
(1), prefabricated transverse rolling edge convexity: rolled piece is carried out longitudinal rolling, and in this operation of rolling prefabricated transverse rolling edge convexity, determine to roll rearward end convexity and horizontal length thereof according to operation roll of mill roll surface effective length and rolled piece width, length, thickness before rolling, it determines that principle is: before and after rolling, rolled piece width is similar to constant, the length of rolling rear rolled piece equals roll surface effective length, and defining method is:
In formula,
for prefabricated edge convexity,
for convexity length in the horizontal direction,
when prefabricated transverse rolling edge convexity, for rolling rear length of rolled piece and working roll can roll Breadth Maximum, when prefabricated axial rolling edge convexity, be finished width,
for drafts during prefabricated edge convexity,
for correction factor, to split defect relevant along the plate width direction degree of depth with limit when alloy designations, coefficient of draught and pair rolling, value 150 ~ 350,
,
,
be followed successively by thickness, length and the width before the prefabricated convexity of rolled piece,
for the thickness in convexity region non-after the prefabricated convexity of rolled piece;
(2) the broadening rolling of orthogonal control limit and prefabricated axial rolling edge convexity: after completing steps (1) the described operation of rolling, rolled piece half-twist is carried out transverse spreading rolling, the rolled piece width after broadening is made to equal finished width, this link at least needs two passes, and in the end a time prefabricated axial rolling edge convexity, convexity and horizontal length thereof are still determined by the method in step (1);
(3) the longitudinal finish rolling in orthogonal control limit: after the prefabricated axial rolling edge convexity described in completing steps (2), first by rolled piece half-twist, then carry out the little pressure rolling of longitudinal multi-pass, until target thickness, complete rolling.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216145A (en) * | 2019-07-10 | 2019-09-10 | 太原科技大学 | Milling method is split on a kind of magnesium alloy plate grain refining control side |
| CN110369494A (en) * | 2019-07-30 | 2019-10-25 | 辽宁科技大学 | A kind of anisotropic Finish Machining System of reduction metal material and method |
| CN110560483A (en) * | 2019-09-03 | 2019-12-13 | 太原科技大学 | Edge-convexity edge-control rolling method for edge of magnesium alloy slab prefabricated by special-shaped roller |
| CN110722013A (en) * | 2019-09-23 | 2020-01-24 | 太原理工大学 | Method for rolling magnesium-aluminum laminated plate by drum-shaped corrugated roller |
| CN110947766A (en) * | 2019-11-05 | 2020-04-03 | 太原科技大学 | Tapered roller for weakening edge crack of magnesium alloy plate and rolling method thereof |
| CN111389916A (en) * | 2020-03-26 | 2020-07-10 | 太原科技大学 | Gradient tissue regulation and control method based on cross variable thickness rolling |
| CN114101330A (en) * | 2021-11-26 | 2022-03-01 | 中色科技股份有限公司 | Rolling base plate for producing titanium alloy plate |
| CN117483424A (en) * | 2023-11-17 | 2024-02-02 | 燕山大学 | Axially movable special-shaped roller for improving edge crack of magnesium alloy plate and rolling method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6268608A (en) * | 1985-09-19 | 1987-03-28 | Kawasaki Steel Corp | Rolling method for thick plate |
| JP2000033405A (en) * | 1998-07-21 | 2000-02-02 | Hitachi Ltd | Rolling mill and rolling method |
| CN102886381A (en) * | 2011-07-22 | 2013-01-23 | 宝山钢铁股份有限公司 | Thick plate rolling method |
| CN103272852A (en) * | 2013-04-30 | 2013-09-04 | 中色科技股份有限公司 | Technology for rolling wide magnesium alloy plate and strip |
| CN103480648A (en) * | 2013-09-18 | 2014-01-01 | 济钢集团有限公司 | Novel PVPC (plan view pattern control) rolling process for surface plates |
| CN104307887A (en) * | 2014-08-21 | 2015-01-28 | 柳州钢铁股份有限公司 | Plate shape control method in medium-thickness plate forming stage |
-
2015
- 2015-09-02 CN CN201510553847.7A patent/CN105170660B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6268608A (en) * | 1985-09-19 | 1987-03-28 | Kawasaki Steel Corp | Rolling method for thick plate |
| JP2000033405A (en) * | 1998-07-21 | 2000-02-02 | Hitachi Ltd | Rolling mill and rolling method |
| CN102886381A (en) * | 2011-07-22 | 2013-01-23 | 宝山钢铁股份有限公司 | Thick plate rolling method |
| CN103272852A (en) * | 2013-04-30 | 2013-09-04 | 中色科技股份有限公司 | Technology for rolling wide magnesium alloy plate and strip |
| CN103480648A (en) * | 2013-09-18 | 2014-01-01 | 济钢集团有限公司 | Novel PVPC (plan view pattern control) rolling process for surface plates |
| CN104307887A (en) * | 2014-08-21 | 2015-01-28 | 柳州钢铁股份有限公司 | Plate shape control method in medium-thickness plate forming stage |
Non-Patent Citations (1)
| Title |
|---|
| 丁修坤: "《轧制过程自动化》", 31 January 2005, 冶金工业出版社 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216145A (en) * | 2019-07-10 | 2019-09-10 | 太原科技大学 | Milling method is split on a kind of magnesium alloy plate grain refining control side |
| CN110216145B (en) * | 2019-07-10 | 2020-12-15 | 太原科技大学 | Magnesium alloy plate fine-grain chemical edge cracking rolling method |
| CN110369494A (en) * | 2019-07-30 | 2019-10-25 | 辽宁科技大学 | A kind of anisotropic Finish Machining System of reduction metal material and method |
| CN110560483A (en) * | 2019-09-03 | 2019-12-13 | 太原科技大学 | Edge-convexity edge-control rolling method for edge of magnesium alloy slab prefabricated by special-shaped roller |
| CN110722013A (en) * | 2019-09-23 | 2020-01-24 | 太原理工大学 | Method for rolling magnesium-aluminum laminated plate by drum-shaped corrugated roller |
| CN110722013B (en) * | 2019-09-23 | 2021-04-06 | 太原理工大学 | Method for rolling magnesium-aluminum laminated plate by drum-shaped corrugated roller |
| CN110947766A (en) * | 2019-11-05 | 2020-04-03 | 太原科技大学 | Tapered roller for weakening edge crack of magnesium alloy plate and rolling method thereof |
| CN110947766B (en) * | 2019-11-05 | 2021-07-06 | 太原科技大学 | Tapered roller for weakening edge crack of magnesium alloy plate and rolling method thereof |
| CN111389916A (en) * | 2020-03-26 | 2020-07-10 | 太原科技大学 | Gradient tissue regulation and control method based on cross variable thickness rolling |
| CN114101330A (en) * | 2021-11-26 | 2022-03-01 | 中色科技股份有限公司 | Rolling base plate for producing titanium alloy plate |
| CN114101330B (en) * | 2021-11-26 | 2024-03-29 | 中色科技股份有限公司 | Rolling base plate for producing titanium alloy plate |
| CN117483424A (en) * | 2023-11-17 | 2024-02-02 | 燕山大学 | Axially movable special-shaped roller for improving edge crack of magnesium alloy plate and rolling method |
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